Q4 of 18 Page 62

Answer the following questions:

What are genes? Mention their importance.

Gene is the functional unit of hereditary. It carries genetic information in the form of DNA. The physical appearance (phenotype) of an organism is determined by its genes and the information that they carry. DNA has a specific sequence that is responsible for making different proteins. It is through genes that the characteristics of parents pass on to their offspring. They help in the transmission of characters.


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2

Fill in the blanks with suitable words:

1. The instrument that led to the understanding of the cell is _________.


2. The organelle which controls the various activities of the cell is_____.


3. The organelle which is called the ‘kitchen of the plant cell’ is _____ .


4. The site of protein synthesis in the cell is _________.


5. The main chemical component of the cell wall is __________.

 3

Match the following:

 4

Answer the following questions:

Which organelle in an animal cell is useful during cell division?

 4

Answer the following questions:

What is the role of chloroplast in a plant cell?